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WINDOW ENVELOP.

APPLICATION FILED SEPT. 5,1916.

1,324,628. I I Patented D90. 9,1919.

FIG I.

lrUNTTED 'sTATEs PATENT OFFICE.

GEORGE W. SWIFT, JR., OF BORDENTOWN, NEW'JERSEY. 1

WINDoW-ENvELoP. i ,Y

To all whom t may concern: v

Be it known that I, GEORGE IV. SWIFT, Jrl, of Bordcntown, in the county of Burlington and State vof New Jersey, have invented certain new and useful Improvements 'inlVindow-Envelops, whereof the fol-lowing is a specification, reference being". had to thev accompanying drawings.

My invention relates to so-ealled window envelops, in which there is provided'alr -piece of transparent paper or similar continuous material on the vinside of the window. I

According' to'my invention instead of either of these methods of construction, I lsec-ure upon the inside of the envelop a series of threads which stretch across the window opening, and 4thereby accomplish the same result more satisfactorily and more economically.

In the drawings, Figure I, is a plan view of an envelop embodying my' construction, and

Fig. II, is a vertical sectional View of the same.

The envelop l, is ofpaper and of any customary form or construction employed for mailing envelops. The window opening 2, is an elongated aperture preferably with curved ends cut therein as customary in this art, occupying that part of the back of the envelop where the name of the addressee should ordinarily appear.

Threads 3, 3, 3, are attached to the inner surface of the back of the envelop, and traverse the window opening vertically, z'. e.,

in the direction of its shorter diameter.

Specification iof Letters Patent. Patented Dec, 9 1919 Application filed September 5, 1916.

Serial No. 118,316.

These threads are spaced at suitable intervals apart, so as `.to render the removal of the contents of the envelop through the window impossible without tearing or mutilating the envelop. They are of a sufficiently small size to avoild objectionable interference with the visibility otl the name and address as displayed on the contents of the en- ;velop, and they ar A,of a length to supply a fsufiicient amount of overlap at either end for vfirm attachment to the inner surface of ythe envelop. Being relatively widely spaced as compared with the threads of gauze or rsimilar netting, they obscure the name and taddrcss far less, especially as the spaces'or openings between them are substantially unobstructed. This attachment is preferably accomplished by a suitable gum'or adhesive material with which the thread is saturated before its application to tho inner side of the envelpp. v I have shown in the drawing a number of threads or cords arranged in parallel vertical relation to each other in order to protect the window opening. VIn practice the number and position of the threads may vary.

Having thus described my invention, I claim:

A mailing envelop having an elongated horizontal aperture cut therein, on that part of the back of the envelop where the name' of the addressee ordinarily appears, and having a series of relatively widely spaced threads with the openings between them substantially unobstructed attached to the inner side of the envelop and arranged to traverse the aperture substantially at right angles to its length.

In testimony whereof, I have hereunto signed my name, at Philadelphia, Pennsylvania, this 31st day of August, 1916.

GEORGE w. swiET, Je.

Witnesses:

JAMES I-I. BELL, E. L. FULLEBTON. 

